But the scientists focused this particular study on the excavated food .
但是科学家把此次特殊研究工作的重点放在被挖掘的食物上。
Investigations showed that excavated dirt piled next to the building may have caused the collapse .
调查称怀疑倒塌是由于挖掘出的散土堆在建筑附近。
Surveys of the site have shown that the site was excavated in the 1980s to such a depth that no tombs or other historical artefacts survived .
对该地的调查显示，这里在20世纪80年代挖掘过深，古墓和其它历史文物都不复存在了。
A curator tells me they once belonged to high-ranking members of an early nomadic community , and had been excavated from an ancient burial ground in northern tuva .
